An interpretation of the 1.2-cm methanol emission in Orion

Details An interpretation of the 1.2-cm methanol emission in Orion An interpretation of the 1.2-cm methanol emission in Orion

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pazh....7..406s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 7, July 1981, p. 406-413.) Soviet Astronomy Letters, vol. 7, July-Aug. 1981, p. 223-228

Astronomy and Astrophysics

Astronomy

1

Emission Spectra, Interstellar Masers, Methyl Alcohol, Molecular Oscillations, Radio Emission, Abundance, Astronomical Models, Gas Density, Molecular Spectra, Protostars, Radiative Transfer

Scientific paper

Two possible mechanisms for pumping the CH3OH masers in OMC 1 are analyzed. Because radiative-radiative pumping through vibrational transitions requires an implausible combination of low gas density and high methanol abundance, an alternative mechanism is proposed which consists of collisional-radiative pumping through rotational transitions with cold dust acting as an energy sink. In addition, a model is suggested in which the CH3OH condensations represent protostars in a phase of incipient contraction prior to formation of their core.

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